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cats-hw.c

/*
 * linux/arch/arm/mach-footbridge/cats-hw.c
 *
 * CATS machine fixup
 *
 * Copyright (C) 1998, 1999 Russell King, Phil Blundell
 */
#include <linux/ioport.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/screen_info.h>
#include <linux/io.h>
#include <linux/spinlock.h>

#include <asm/hardware/dec21285.h>
#include <asm/mach-types.h>
#include <asm/setup.h>

#include <asm/mach/arch.h>

#include "common.h"

#define CFG_PORT  0x370
#define INDEX_PORT      (CFG_PORT)
#define DATA_PORT (CFG_PORT + 1)

static int __init cats_hw_init(void)
{
      if (machine_is_cats()) {
            /* Set Aladdin to CONFIGURE mode */
            outb(0x51, CFG_PORT);
            outb(0x23, CFG_PORT);

            /* Select logical device 3 */
            outb(0x07, INDEX_PORT);
            outb(0x03, DATA_PORT);

            /* Set parallel port to DMA channel 3, ECP+EPP1.9, 
               enable EPP timeout */
            outb(0x74, INDEX_PORT);
            outb(0x03, DATA_PORT);
      
            outb(0xf0, INDEX_PORT);
            outb(0x0f, DATA_PORT);

            outb(0xf1, INDEX_PORT);
            outb(0x07, DATA_PORT);

            /* Select logical device 4 */
            outb(0x07, INDEX_PORT);
            outb(0x04, DATA_PORT);

            /* UART1 high speed mode */
            outb(0xf0, INDEX_PORT);
            outb(0x02, DATA_PORT);

            /* Select logical device 5 */
            outb(0x07, INDEX_PORT);
            outb(0x05, DATA_PORT);

            /* UART2 high speed mode */
            outb(0xf0, INDEX_PORT);
            outb(0x02, DATA_PORT);

            /* Set Aladdin to RUN mode */
            outb(0xbb, CFG_PORT);
      }

      return 0;
}

__initcall(cats_hw_init);

/*
 * CATS uses soft-reboot by default, since
 * hard reboots fail on early boards.
 */
static void __init
fixup_cats(struct machine_desc *desc, struct tag *tags,
         char **cmdline, struct meminfo *mi)
{
      screen_info.orig_video_lines  = 25;
      screen_info.orig_video_points = 16;
      screen_info.orig_y = 24;
}

MACHINE_START(CATS, "Chalice-CATS")
      /* Maintainer: Philip Blundell */
      .phys_io    = DC21285_ARMCSR_BASE,
      .io_pg_offst      = ((0xfe000000) >> 18) & 0xfffc,
      .boot_params      = 0x00000100,
      .soft_reboot      = 1,
      .fixup            = fixup_cats,
      .map_io           = footbridge_map_io,
      .init_irq   = footbridge_init_irq,
      .timer            = &isa_timer,
MACHINE_END

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